Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18711275bdcd032…

MALICIOUS

PDF

80.7 KB Created: 2021-07-07 06:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90e95ad12554681ccae61906d69ddc26 SHA-1: 5af6b81576e083c9b49b55ba3a9c814a4d3ace93 SHA-256: f18711275bdcd032f368fd614ce572c51190120dfd333b25eba417a5aa9fff74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=superlive+plus+coffee+cup+symbol
    • https://www.djluk.co.uk/wp-content/plugins/super-forms/uploads/php/files/lmlr8rr3r6pbo7ltmqpk5nnsva/93710999787.pdf
    • http://enricobarraco.com/files/33330413637.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78b4d5b45c---49603731892.pdf
    • http://matsonconstruction.net/userfiles/file/96762899798.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/5aj3nih2fa0nhl6jp5safkev9d/93721669017.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c2e694b9---86720347429.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c4387e1b---zabebamume.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/6d1c70f999145527246320a16c2118a6/zetem.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606efea368c28---47728995493.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6107d4669f---71025599497.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4a077d17f---mivimevorisokekopixiludi.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/82gh4ovrhv71bl19n1o1gqlkql/7692033477.pdf
    • http://stlnsk.ru/uploads/file/bupejasefoniwiruluxu.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/aefd0fdfadf7dcfd1f2dba0cafabd5a1/43939289543.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/20669258404.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/f81ptrj0m9ppd20mnn7svtta4f/kavol.pdf
    • http://bularz-auto.pl/images/userfiles/file/jaxemal.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/03cbb0f2f059fc8884596f3552809cdc/guwulobonixobemoxex.pdf
    • http://myucpb.net/userfiles/file/webasekonivutozixevesar.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/psds957pp919e5aiik3jhjmcn0/75017649244.pdf
    • https://stalbeckers.nl/userfiles/image/file/vavexo.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c12038933a7---tiduzafasavijusoferovelof.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f64f892e1f---73196497508.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/227f87826051daa2bf4d50ac26d0b00d/97458872482.pdf
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/acb6df2f51c7be0aff34714c99f51aea/33641981281.pdf
    • https://aimhc.com/userfiles/file/38574022211.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d042.bin
3f1748778f03e7b7e2d3a6c88ca15ef060a02f224cd71155e662fde9dd4c56c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD042 1672 bytes
font_01_sfnt_off0000d834.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD834 16792 bytes
font_02_sfnt_off0000f046.bin
e523becd3a4a5d6e5b9e0fc81f9330b856dcc481c69d2fcafbd2e6c9926c930e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF046 16748 bytes
font_03_sfnt_off00011c13.bin
3467932c2cba49187a971eff448e52896b9fe3fcfed4fbdf7a12126f34ebed70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C13 10772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.